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Equipment Held for Operating Lease (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 USD ($) engine item aircraft region | Dec. 31, 2017 USD ($) item aircraft | Dec. 31, 2016 USD ($)
Equipment Held for Lease |  |  |
Number of geographic regions in which aircraft lessees are domiciled in | region | 8 |  |
Lease rent revenue | $ 175,609 | $ 130,369 | $ 119,895
Net book value of equipment held for operating lease | 1,673,135 | 1,342,571 |
Minimum future payments under non-cancelable leases |  |  |
2019 | 136,549 |  |
2020 | 68,565 |  |
2021 | 44,163 |  |
2022 | 30,017 |  |
2023 | 12,019 |  |
Thereafter | 7,299 |  |
Minimum future payments | 298,612 |  |
Europe |  |  |
Equipment Held for Lease |  |  |
Lease rent revenue | 70,842 | 50,789 | 44,650
Net book value of equipment held for operating lease | 624,913 | 444,938 |
Asia |  |  |
Equipment Held for Lease |  |  |
Lease rent revenue | 40,717 | 34,169 | 34,524
Net book value of equipment held for operating lease | 368,690 | 258,501 |
South America |  |  |
Equipment Held for Lease |  |  |
Lease rent revenue | 40,100 | 20,307 | 13,395
Net book value of equipment held for operating lease | 260,095 | 251,959 |
United States |  |  |
Equipment Held for Lease |  |  |
Lease rent revenue | 11,338 | 11,958 | 11,504
Net book value of equipment held for operating lease | 118,508 | 111,999 |
Mexico |  |  |
Equipment Held for Lease |  |  |
Lease rent revenue | 4,721 | 5,409 | 6,251
Net book value of equipment held for operating lease | 43,602 | 61,606 |
Canada |  |  |
Equipment Held for Lease |  |  |
Lease rent revenue | 4,585 | 4,355 | 4,049
Net book value of equipment held for operating lease | 33,795 | 34,399 |
Middle East |  |  |
Equipment Held for Lease |  |  |
Lease rent revenue | 3,286 | 3,360 | 3,674
Net book value of equipment held for operating lease | 18,792 | 28,977 |
Africa |  |  |
Equipment Held for Lease |  |  |
Lease rent revenue | 20 | 22 | $ 1,848
Net book value of equipment held for operating lease | 2,597 | 2,959 |
Off-lease and other |  |  |
Equipment Held for Lease |  |  |
Net book value of equipment held for operating lease | $ 202,143 | $ 147,233 |
Equipment held for lease Member | Engines and Related Equipment |  |  |
Equipment Held for Lease |  |  |
Number of equipments held for lease | 244 | 225 |
Equipment held for lease Member | Other leased parts and equipment |  |  |
Equipment Held for Lease |  |  |
Number of equipments held for lease | item | 10 | 7 |
Equipment held for lease Member | Aircrafts |  |  |
Equipment Held for Lease |  |  |
Number of equipments held for lease | aircraft | 17 | 16 |
Month-to-month leases |  |  |
Equipment Held for Lease |  |  |
Net book value of equipment held for operating lease | $ 216,523 |  |
Leases expiring 2019 |  |  |
Equipment Held for Lease |  |  |
Net book value of equipment held for operating lease | 588,615 |  |
Leases expiring 2020 |  |  |
Equipment Held for Lease |  |  |
Net book value of equipment held for operating lease | 290,882 |  |
Leases expiring 2021 |  |  |
Equipment Held for Lease |  |  |
Net book value of equipment held for operating lease | 63,387 |  |
Leases expiring 2022 |  |  |
Equipment Held for Lease |  |  |
Net book value of equipment held for operating lease | 165,117 |  |
Lease expiring 2023 |  |  |
Equipment Held for Lease |  |  |
Net book value of equipment held for operating lease | 90,490 |  |
Leases expiring thereafter |  |  |
Equipment Held for Lease |  |  |
Net book value of equipment held for operating lease | $ 55,978 |  |

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